Coal-sizing and impurity-separating device



June 11, 1929.

w. F. DAVIS 1.716.486

COAL SIZING AND IMPURITY SEPARATING DEVICE Filed July 19, 1926 3 Sheets-Sheet l June 11, 1929.

w. F. DAVIS COAL SIZING AND IMPURI'IY SEPARATING DEVICE Eiled July 19, 1926 3 Sheets-Sheet June- 11; 1929.

w. F. DAVIS COAL SIZING AND IMPURITY SEPARATING DEVICE Filed July 19, 1926 3 Sheets-Sheet 6 220622272 if/zzlz'a/rz Ffia ls.

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Patented June ll, $29,.

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Application filed July 19 1926-. Serial No. 123,412.

My invention relates to a bituminous coal sizing and impurity separating device adapted primarily for use at coal mines and from which device, the sized coal is progressively loaded directly into coal cars, although not necessarily limited thereto, and the device is a distinct and practical improvement to over come ce tain practical objections to, and defects in, the present method of sizing coal and separating impurities therefrom, which present method, as far as is known, is manually accomplished by hand picking, which s slow, expensive-and very unsatisfactory, as a large percentage of impurities and undersize coal is missed even by a large crew of hand pickers assigned to each car.

The primary object of my present invention is the provision of a shaker frame having I a plurality of spaced parallel arranged bars forming elongated passages therebetween with each alternate bar pivotally supported at one end for vertical oscillating movement simultaneously with a. horizontal reciprocating movement of the whole shaker frame for removing or separating any material while passing thereover having characteristics .of fracture similar to the impurities found in bituminous coal, such as sulphur bands, slate, shale, and the like and, at the same time, acting as a sizing device for discharging at the lower end of the shaker frame, coal of a predetermined size and separating by agitation and gravity in its travel along the shaker frame from the predeterminedsize, all undersized pieces of coal with the impurities.

A further object of the invention is the provision of an inclined receiving plate disposed below the shaker frame bars for catching the impurities and the undersize pieces of coal and from which they are discharged into an inclined perforated separating plate for separating the undersized pieces of coal from the impurities by the passage of coal through the perforated plate while the impurities are discharged from the lower end of the perforated plate.

A further object of the invention is the provision of means for imparting horizontal reciprocating movement to the shaker frame and the provision of means for imparting vertical oscillating movement to each alternate bar of the shaker frame to set up a so called scissors action tothe spaced shaker frame bars, without actual contact of .the bars with each other. I

A further object of the invention is the prov vision of means for separating pieces of coal of predetermined size from undersized pieces of coal and impurities having characteristics of fracture usually found'in beds of bituminous coal.

Another object of the invention is the provision of a device of the class described, which is simple in construction and operation, strong and durable, highly efficient in its operation, and, at the same time inexpensive in cost of manufacture.

lVith the above and other objects in view, the invention consists of the novel features of construction, arrangement and combination of parts hereinafter more fully described and finally pointed out in the claims hereto appended. Y

Referring to the accompanying drawings forming a part of this specification, wherein like characters of reference denote similar parts thoughout the several views:

Fig. 1 is a top plan view offa device embodying the features of my invention with a number of the shaker frame bars removed.

' Fig.2, is a side elevation partly broken away of'the device.

Fig. 3, is a detail'showing the vertical oscillating movement of the alternate sub-bed bars with relatioirto the main bed bars of the shaker frame. I

Fig. 4 is a front elevation of the shaker frame, looking in the direction of the arrow in I In carrying out theaim of my present invention in its preferred embodiment, I employa shaker frame which consists of a pair of suitable side frame members 1 which are spaced the desired distance apart and tied together at their inner and outer ends by means of the tie rods 2 and 3, respectively.

Suitable, preferably fiat rectangular shaker frame bars 4 are supported at their inner and outerends by means of the tie rods 2 and 3 which pass through openings therein. The shaker frame bars lare set at spaced predetermined distances apart, with the widths of the bars in vertical position. The distance which the bars 4 are spaced apart is determined by the width of the spacer sleeves 5 which are loosely mounted upon the outer tie rod 3 between each pair of bars, as clearly shown in Fig. 1. Securing nuts 6 are carried by the ends of the tie rod 3 which nuts engage the outer faces of the side members 1 of the shaker frame to preventlateral displacement of the bars 4 upon the tie rod 3.

Suitable, preferably flat rectangular shaker frame bars 7 are pivotally connected attheir inner ends to the, tie rod 2. These bars 7 hereinafter known as alternate bars are equally spaced between the fixed shaker frame bars 4 by means of the loosely mounted spacer sleeves 8 and then all of the shaker frame bars are held against lateral displacement upon the rod 2 by means of the securing nuts 9, carried near the ends of the rod 2 and which engage the outer faces of the side shaker frame members 1, as shown in Fig. 1.

A pair of suitable spacer bars 10 are fixed to the side faces of each alternate shaker frame bar 7 at a right angle thereto at the discharge end thereof, and the spacer bars are disposed to the inner side of the tie rod 3 owing to the fact that the pivotally mounted shaker frame bars 7 are shorter than the fixed shaker frame bars 4, as shown in Fig. 2. The spacerbars lvextend downwardly below the lower plane of the bars 7 and are suitably fixed at their lowerends to a sill member 11 which is preferably T-shaped in endelevation. The spacing bars 10 and the sill member tend to tie the discharge ends of the pivotally mounted shaker frame bars together and being associated with the tie rod sleeves provide the proper spacing of the bars 4 and at the discharge ends thereof,thus causing the spaces, or passages 12 between the bars 4 and 7 to remain uniform throughout their length for undersized pieces of coal and impurities and materials of a flat nature to drop through the discharge spaces 12 of the shaker frame to an inclined non-perforated receiving plate 13 disposed below the shaker frame and connected thereto in parallel spaced relation by means of suitable connections 14 and 15 and from which plate it is discharged upon an inclined perforated plate 16 for separating the undersized pieces of coal from the impurities. lVhile the materials are passing downwardly over the perforated plate 16, the recoverable products, or undersized pieces of coal drop through the perforations of the plate 16 to be wasted or further treated while the impurities usually of a flat nature, are discharged from the lower end of the perforated plate onto a chute 17.

A plurality of suitable hangers 18 are vhingedly connected at their upper ends to eyebolts 19 fixed to a suitable overhead support 20, while the lower ends thereof are pivotally connected to the side members of the shaker frame, so that the shaker frame and its associated parts will be suspendedfrom the supports 20. v

The mechanism 'to'impart horizontal reciprocating movement to the shaker frame simultaneously therewith and impart vertical oscillating movement to the alternate shaker frame bars 7 may be varied, but for the sake of illustration only, I have shown an overhead main drive shaft 21 journaled in a plurality of suitable hanger bearings 22 and which is provided with the crank arms 23 and 24. Connecting the crank arms 23 and 24 with the shakerframe tie rod 2 are a pair of suitable connecting rods 25 and 26, respectively. A pair of suitable gears 27 and 28 are fixed to the main drive shaft 21 which gears 27, and 28 are adapted to mesh with suitable gears 29 and 30, respectively, fixed to the shafts 31 and 32 journaled in the bearings 33 and 34, respectively. The shafts 31 and 32 are provided with the end plates 35 and 36, respectively, having the eccentric pins 37 and 38 respectively. Suitable connecting arms or pit-men 39 and 40 are connected at their upper ends to the eccentric pins 37 and 38, respectively and pivotally connected at their lower ends to the ends of the sill member 11.

.This arrangement of parts, it will be obin fixed relation to the frame and a sub-bed i of alternately spaced bars in movable relation to the frame. The main bed of spaced bars 4 are movable horizontally only, while the subbed of bars 10 are movable horizontally and oscillated vertically simultaneously.

The vertical oscillating action of the subbed bars 7 of the shaker frame with respect to the fixed main bed bars 4 is of course determined by the stroke of the connecting arms 39 and 40, but the best results are attained by causing the lower corners of the discharge ends of the sub-bed bars 7 to move upwardly to a point ust below the top plane of the fixed bars 4 of the main bed in the upward movement of the bars 7 and to cause the upper corners of the discharge ends of the sub-bed bars 7 to move downwardly to a point just above the lower plane of the fixed bars 4, as shown in detail in Fig. 3. In this figure, it will be also observed that the upper plane of the sub bed bars 7 at the rear ends thereof, or the feed end of the shaker frame are always disposed slightly above the upper plane of the main bed bars 4 due'to the manner in which they are pivotally mounted upon the tie rod 2. The action of the sub-bed bars 7 with relation to the main bed bars 4 is similar to a scissors action without actual contact of the sub-bed bars with the main bed bars. The action of greater tilting and turning action to the material upon the shaker frame, thus resulting in all undersized pieces of coal together with all materials of a flat nature which are usually impurities to drop through the spaces 12 between the main and sub-bed bars 4 and 7', respectively, to the receiving plate 13 below, while all pieces of coal of a size larger than the spaces between the bars 4 and 7 will be discharged from the shaker frame at the lower ends thereof into a car, or other deposltory.

In order to prevent any possible chance for thesub-bed bars 7 to move upwardly or downwardly at their discharge ends beyond the distances disclosed in Fig. 3, I provide one end of the sill member 11 with a, suitable arm 41 having the inwardly directed upper end to engage the lower flange of one of the side frame members 1 in its down movement dur ing the oscillation of the sub-bed bars 7 and to engage the bracket 42 in its upward movement with the sub-bed bars 7.

From the foregoing description, it is evident that I provide a novel and efiicient device for simultaneously sizing selected pieces of coal and separating impurities and refuse, as well as undersized pieces of coal therefrom in their travel upon the inclined shaker frame.

The many advantages of the herein described invention will readily suggest themselves to those skilled in the art to which it appertains.

I do not wish to be understood as having limited myself to the exact, details of con-- struction shown and described, but desire to have it understood that the invention I have shown in the drawings is merely illustrative, as it is manifest that various minor changes may be made in the exact construction and particular arrangement of parts without departing from the spirit of my invention, hence I reserve the right to make any such changes, or modifications as may fairly fall within the scope of the appended claims when fairly construed.

What I claim is:

1. In a device of the class described, a shaker frame comprising sidemembers, a pair of relatively stationary transverse rods connecting said side members, means for suspending and swingingly supporting said frame, stationary transversely spaced longitudinal main bed bars supported at opposite ends upon said rods, spacer sleeves upon one of the rods for retaining the bars at one end in their spaced relation, transversely spaced longitudinally sub-bed bars disposed between the main bed bars and stopping short of the sleeves spacing the main bed bars at one end, said sub-bed bars being hingedly supported upon one of the stationary transverse rods with the upper plane of the bars slightly above the upper plane of the main bed bars, arms depending "from the free ends of the sub-bed arms and passing and extending to a point below the lower plane of the main bed bars, a transverse member connecting said depending'arms and means for imparting inclined vertical reciprocating movement to said sub-bed bars synchronized with the longitudinal swinging movement of both the main and sub-bed bars and stops for limiting the upward and downward reciprocating movement of the-sub-bed bars.

2. A shaker structure, a pair of rods, a pair of laterally spaced side frame members relatively fixed to the endspf said rods for sup porting transversely spaced longitudinal main bed bars supported at cachend of said rods, spacer'sleeves carried by'one of said rods for separating said main bed bars, transversely spaced longitudinal sub-bed bars pivotally supported at one end between the main bed bars by the other rod with the upper plane of the sub-bed bars above the upper plane of the main bed bars at the pivot point and with the freeend of said sub-bed bars stopping just short of the first mentioned rod spacer sleeve on said rod bed, the main and sub-bed bars, spacer arms directed downwardly from the free end of each sub-bed bar 'to a point below the lower plane of the main bed bars, a transverse bar fixed to the lower ends of the spacer arms, swingingly supported hangers for suspending said structure in an inclined position, means for simultaneously imparting longitudinal swinging movement to the main bed bars and the subbed bars and .means connected with said transverse bar for imparting vertical reciprocating movement to the free ends of the sub-bed bars synchronized with the longitudinal swinging movement of said bars.

3. In a device of the class described, a material receiving table consisting of a plurality of spaced parallel bars, means for swingingly supporting said table in suspendedrelation to a support, a rod stationary relative to the table and movable therewith for pivotally sup,- porting each alternate bar at its material receiving end, means for imparting longitudinal reciprocating movement to the table and means for simultaneously imparting arcuate movement to the pivotally supported bars.

4. In a device of the class described, a material receiving table consisting of a plurality of spaced parallel bars, means for swingingly supporting said table in an inclined position in suspended relation to a support, means for end to the table, means for nnparting longitudinal reciprocating movement to the table including all the bars and means for simultaneously imparting vertical oscillating movement to the pivotally supported bars.

6. In a device for separating materials hav ing characteristics of fracture from bituminous coal consisting of an agitating table composed of a plurality of bars fixed relative to the table and a plurality of pivotally supportedbars all of which bars are disposed in spaced parallel relation means for imparting longitudinal reciprocating movement to the table including all of the bars and means for simultaneously imparting vertical oscillating movementto the pivotally supported bars.

7. In a device for separating materials'hav- 'ing characteristics of fracture from bituminous coal, an overhead support, a shaker table suspended from said support including a plurality of spaced bars fixed relative to the table, a plurality of bars movable relative-to the fixed bars and associated with the fixed bars in spaced relation thereto to rovide material escaping spaces between the ars, means for imparting longitudinal reciprocating movement to the table including all the bars and means for simultaneously imparting vertical oscillating movement to the movable bars.

' 8. In a device of the class described for separating impurity materials having characteristics of fracture from bituminous coal at i the mines, consisting of a support, a suspended inclined frame movable relative to the support, spaced parallel bars fixed relative to the frame, spaced parallel bars movable relative to the frame and the fixed bars to provide'discharge spaces between'the fixed and relatively movable bars, means for imparting swinging movement to the frame including the fixed and movable bars and means for simultaneously imparting vertical oscillating movement to the movable bars to cause the impurity materials undersized pieces of coal and slaclr to be separated from pieces of coal of predetermined selected size by falling through the discharge spaces between the bars during itsdownward travel over both the fixed and relatively movable bars.

9. In'adevice of the class described, a material receiving frame consistingof 'a pinrality of spaced parallel bars of which each alternate bar is arcuately movable relative to remaining bars, means for swingingly supporting the table in an inclined position, a rod stationary relative to the frame for movement therewith for hingedly supportingeach alternate bar at its material receivingend and means for imparting longitudinal reciprocating movement to allof said bars simultaneously with the arcuatemovement of the hingedly supported bars. a

10. In a device of the'class'described, an overhead support, a frame movablysuspendcd from said support, said frame including a pair of side members and a pair of end tie rods fixed to said side members, a plurality of bars supported at opposite ends by said rods and fixed relatively to the frame, a plurality of relatively shortbars pivetally supported by one of said rods between the fixed bars, means for imparting vertical arcuate movement to the short bar relative to the frame and the fixed bars and means for imparting longitudinal swinging movement to v the frame, the fixed bars andthe arcuately movable bars simultaneously with the vertical arcuate movement of the short bars.

In testimony whereof, I have hereunto signed my name tothe specification.

WILLIAM F. DAVIS. 

